private void SavePackageInfo(MemoryStream fileStream)
{
var indexPositionData = EncodeDecoder.EncodeUInt32(m_packageInfo.IndexOffset);
fileStream.Write(indexPositionData, 0, indexPositionData.Length);
fileStream.Flush();
}
public static IndexInfo Decode(byte[] data, ref int offset)
{
var info = new IndexInfo();
info.Id = EncodeDecoder.DecodeString(data, ref offset);
info.FileName = EncodeDecoder.DecodeString(data, ref offset);
info.Path = EncodeDecoder.DecodeString(data, ref offset);
info.Offset = EncodeDecoder.DecodeUInt32(data, ref offset);
info.Length = EncodeDecoder.DecodeUInt32(data, ref offset);
info.PageLength = EncodeDecoder.DecodeUInt32(data, ref offset);
info.Deleted = EncodeDecoder.DecodeBoolean(data, ref offset);
return(info);
}
public static byte[] Encode(IndexInfo info)
{
var result = new List <byte>();
result.AddRange(EncodeDecoder.EncodeString(info.Id));
result.AddRange(EncodeDecoder.EncodeString(info.FileName));
result.AddRange(EncodeDecoder.EncodeString(info.Path));
result.AddRange(EncodeDecoder.EncodeUInt32(info.Offset));
result.AddRange(EncodeDecoder.EncodeUInt32(info.Length));
result.AddRange(EncodeDecoder.EncodeUInt32(info.PageLength));
result.AddRange(EncodeDecoder.EncodeBoolean(info.Deleted));
return(result.ToArray());
}
private Mogo.Util.PackageInfo GetPackageInfo(FileStream fileStream, long fileSize)
{
Mogo.Util.PackageInfo info = new Mogo.Util.PackageInfo();
if (fileSize < Mogo.Util.PackageInfo.GetPackageSize())
{
return(new Mogo.Util.PackageInfo());
}
fileStream.Position = fileSize - Mogo.Util.PackageInfo.GetPackageSize();
byte[] buffer = new byte[Mogo.Util.PackageInfo.GetPackageSize()];
fileStream.Read(buffer, 0, Mogo.Util.PackageInfo.GetPackageSize());
int index = 0;
info.IndexOffset = EncodeDecoder.DecodeUInt32(buffer, ref index);
return(info);
}
/// <summary>
/// 获取包信息。
/// </summary>
/// <param name="fileSize"></param>
private PackageInfo GetPackageInfo(MemoryStream fileStream, long fileSize)
{
var packageInfo = new PackageInfo();
if (fileSize < PackageInfo.GetPackageSize())
{
return(new PackageInfo());
}
fileStream.Position = fileSize - PackageInfo.GetPackageSize();//索引信息起始位置存放在文件结尾处。
var lengthData = new Byte[PackageInfo.GetPackageSize()];
fileStream.Read(lengthData, 0, PackageInfo.GetPackageSize());
var index = 0;
packageInfo.IndexOffset = EncodeDecoder.DecodeUInt32(lengthData, ref index);//获取索引信息起始位置
return(packageInfo);
}
private void SavePackageInfo(FileStream fileStream)
{
byte[] buffer = EncodeDecoder.EncodeUInt32(this.m_packageInfo.IndexOffset);
fileStream.Write(buffer, 0, buffer.Length);
fileStream.Flush();
}
public static IndexInfo Decode(byte[] data, ref int offset)
{
return(new IndexInfo {
Id = EncodeDecoder.DecodeString(data, ref offset), FileName = EncodeDecoder.DecodeString(data, ref offset), Path = EncodeDecoder.DecodeString(data, ref offset), Offset = EncodeDecoder.DecodeUInt32(data, ref offset), Length = EncodeDecoder.DecodeUInt32(data, ref offset), PageLength = EncodeDecoder.DecodeUInt32(data, ref offset), Deleted = EncodeDecoder.DecodeBoolean(data, ref offset)
});
}
